Use health estimates as screening context
These tools translate measurements into general estimates for adults. They are educational aids for understanding a formula, not diagnostic systems, treatment plans, or substitutes for individualized healthcare.
Body measurements
BMI, Body Fat, and Ideal Weight use indirect formulas. Body composition, pregnancy, age, ethnicity, disability, athletic build, and medical history can change how a result should be interpreted.
Energy and nutrition planning
BMR estimates resting expenditure; Calorie/TDEE adds an activity assumption; Macro Calculator distributes a calorie scenario. Real needs and dietary suitability require observation and, where appropriate, qualified advice.
Hydration and activity
Water Intake provides a general fluid scenario, while Running Pace performs time-distance arithmetic. Climate, illness, training status, course conditions, and medications are outside a generic calculator.
Before using a result
- Measure consistently and confirm units.
- Read the formula and population limits.
- Look for trends rather than overreacting to one result.
- Seek qualified care for symptoms, extreme results, or medical decisions.
Each tool includes a practical guide, common mistakes, sources, and limitations. Read our calculation and tool methodology for testing, rounding, privacy, and corrections.